Nut-lock.



No. 898,003. PATENTED SEPT. 8, 1908 E. POSSON.

NUT LOCK.

APPLICATION FILED JULY 5, 1906.

| l I l 'l I l Zl/bfifessas- Jam/m .Pasaon. Q 74/29 Qflawuya' plied tolockthe nut on a bolt.

EDWARD POSSON, OF CHICAGO, ILLINOIS.

NUT-LOCK.

Specification ofLetters Patent.

' Patented Sept. 8, 1908.

Application filed July 5, 1906. Serial No. 324,918.

To all whom it may concern:

Be it known that I, EDWARD PossoN, citizen of the United States,residing at Chicago,

in the county of Cook and State of Illinois, have invented certain newand useful Improvements in Nut-Locks; and I do hereby declare thefollowin to be a full, clear, and exact description of t e invention,such as will enable others skilled in the art to which it appertains tomake and use the same.

My invention has for its object to provide a simple, cheap and efiicientnut lock, and to this endit consists of the novel construction andcombination of parts hereinafter described and defined in the claims.

The invention is illustrated in the accompanying drawings, wherein likecharacters indicate like parts throughout the several vlews.

Referring to the drawin s, Figure 1 is a view partly in elevation anpartly section showing one of my improved nut locks ap- Fig. 2 is a planview of the nut lock shown in Fig. 1 removed from working lposition andFig. 3 is a section taken throug the nut lock on the line 20 x of Fig.2.

The numeral 1 indicates a bolt, on the threaded end of which is a nut 2.As shown, the bolt 1 is'passed through a pair of bars 3, and a washer 4is interposed between the nut 2 and one of said bars.

What I believe to be the best form of the nut lock is illustrated inFigs. 1 to 3 inclusive, wherein the numeral 5 indicates a fiat latehaving ta ered end portions that are over or f0 ded inward to-formspring prongs 6. The said s rings,at their opposin ends, are formed witsegmental threads 7 t at are adapted to be screwed onto the threaded endof the bolt 1, under considerable friction.

At the center of the plate 5 is a large passage 8 through which thethreaded end of the bolt is adapted to pass without engagement. Byreference to Fi s. 1, 2 and 3 it will be seen that the segmenta threads7 project inward of thewalls of the passage 8. Said threads 7 may betapered sllghtl toward the passage 18, so as to assist in app ying thenut lock to the threaded end of the bolt. Preferably, the free threadedends of the sprin arms 6 are upset or thickened to increase t enumber ofthreads that may be cut thereon. The nut lock, as will be seen byreference to Fig. 2, is rectangular in plan vlew, so that it may beturned onto the bolt and tightly ressed against the nut b means of awrench.

en the nut lock is a p 'ed as shown in Fig. 1, and the same is tig tlyforced against the nut, the spring arms are pressed more closely to thebody of the said lock, and since'the said arms 6 are normall extended atan closer they are forced to the said body portion, the more tightlythey will be pressed 7 against the threads of the bolt. It is alsoevident that any outward or unscrewin movement of the nut will tend toforce stil more closely together the body and pron portions of the .nutlock, and thereby st' more tightly press the threaded ends of the s ringarmsinto contact with the threads of the bolt.

The improved nut lock above described may be constructed at very smallcost; it may be very quickly and easily applied in working position on abolt by means of a wrench and when applied it will securely hold a nutand will not jar or rattle loose. The said nut uses, and especially foruse on cars and on rail joints where nuts and bolts are sub'ected tomany jarsand strains tending to loosen the nuts. If desired, the devicemay be cast of malleable iron. I

The nut lock, so-called, in one sense pre vents rotation of the boltwith respect to the nut and, hence, might also be designated as a boltlock, but'it will, 'of course, be understood that the term nut lock isherein used threaded for engagement with the threaded.

end' of a bolt or rod, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

EDWARD Po sson.

Witnesses:

H. L. LINTON, O. J. SCHUMAOHER.

dock is, therefore, adapted fora great many I

